The apartment, which was the eighth-priciest sold in the building, will go to auction on July 19.

It was purchased for $US50.9 million in 2014, with a $US35.3 million mortgage loan from Banque Havilland. It was due to be paid in full a year after purchase, but no such payment was made by the shell company the unit was registered under. Havilland is now forcing the auction to recoup the funds it’s missing, plus interest, according to court filings.

One57 is emblematic of New York City’s Billionaire’s Row, a stretch of 57th Street near Central Park, which in recent years has become a magnet for new condos courting high-priced investment. One57 is considered the most expensive of the new buildings, with record-breaking sales that included a $US100.5 million top-floor penthouse.

This is the second apartment in the building to face foreclosure in the last two months. A unit on the 56th floor, which sold for $US21.4 million in July 2015, hit the auction block on June 14. It’s unclear if the property has changed hands yet.